Siemens S7 - 200 test, the application of PLC in a GDX2 packing machine tobacco package

Siemens S7 - 200 test, the application of PLC in a GDX2 packing machine tobacco package newmaker welcome to e hall hall 11 tobacco machinery exhibition hall of tobacco machinery. 。 。 1 introduction as programmable controller as the control core core controller ( MCU） The development of technology, the function of the programmable controller is becoming more and more powerful. Now the programmable controller not only work faster - Logic instruction execution time for each of the zero of a few of us, senior application instructions for each several or dozens of us; And functional - Strong logic operation function, rich mathematical calculation function and reliable remote communication function. Siemens S7 - 200 PLC is one of the above features of small PLC. This paper mainly introduces S7 - 200 PLC in GDX2 packing machine high-speed cigarette package outer packing quality defect detection application example. 2 questions now cigarette market is very competitive, each manufacturer are work hard to improve the quality of their products and maintain the reputation of the brand, so each manufacturer are searching for ways to make their products into the market for the zero defect. In the process of product production factory for product quality control is very strict, especially for cigarettes - at the end of the procedure Packaging process of packaging quality requirements more stringent, often to the same kind of material for defect detection for many times, in order to avoid defective products into the market. Originated from Italy GDX2 packing machine is the best cigarette packaging machine in the world, is also the main industry packing machine, it has a package of good quality and high effective operation efficiency, man-machine high safety and reliability, etc. Despite its detection function is much, but still is not very perfect, can't meet the quality requirements of manufacturer, it is necessary to add some cigarette package outer packing quality defects detection. As in the film packaging of cigarette package part increase clamshell intact detection, film packaging scatter detection, asymmetric short film by mouth detection, etc. 3 options though GDX2 electronic control system is open, use similar VB GDLAN language to write programs, but it is not open to the user, thus to increase the open circuit to realize the new detection. Function as a result of the detection circuit is complex, the main function is to smoke detector detects the bad package shift to eliminate position, make them solenoid valve movement, to eliminate it. Using logic circuit, MCU circuit, one of the three kinds of schemes of PLC circuit can realize the function. Is as shown in table. Through the comparison, obviously option 3, PLC circuit is best, although the cost is higher, but the other performance is best. Scheme of PLC input 4 points for four, three for signal detection, one for synchronous signal; The output points 1, to eliminate the signal. Consider points redundancy and function increasing problems in the future, select eight input point, six dots, model of CPU222 S7 - PLC controller can meet the plan calls for 200. PLC hardware design as shown in figure 1, in which PLC 24 VDC power supply 220 vac and sensors from packaging machines, B1 for proximity switch, B2 for high-resolution color scale photoelectric detector, B3 to touch the micro switch. Program design is divided into 5 bad package testing and shift out two parts. In bad package testing section, synchronous signal is high level effective detection signal effectively, when detected bad package, will shift the position 1. In shift out, in part due to the first testing a shift of 12 packs to eliminate a package, so using a 16-bit word such as VW0 for shift register, and will detect a loaded into the shift register on the corresponding bit of V1. 3 as a '1' to connect Q0. 0,。 0 contact through to remove button manually, eliminate smoke valve action to eliminate the bad package. / / GDX2 - CH packet transparent paper machine packaging appearance tester program / / LD I0. / / A I0 0 file:// synchronous clock. 1 file:// clamshell detection / / ON V1. 0 file:// lack of clamshell cigarette package / / LD I0. / / A I0 0 file:// synchronous clock. A 2 file:// film mouth detection / / ON V1. 7 file:// film taking asymmetric cigarette package/mouth/LD I0. / / A I0 0 file:// synchronous clock. 3 file:// film scatter detection / / ON where V0. 1 package / / LD I0 file:// film out smoke. 0 file:// synchronous clock / / says Mr Galdi at SLW VW0, 1 file:// a clock pulse left one 16-bit registers / / LD where V0. 3 file:// rejecting a / / ON Q0. 0 file:// eliminate signal / / END_OB1 file:// program end / / 6 conclusion GDX2 - CH packet transparent paper machine appearance packaging detector after a year of usage, the failure rate is zero, bad cigarette packet removing rate was one hundred percent, good cigarette package to eliminate error rate is only about one over ten thousand. Using S7 - 200 PLC made detector with low cost, simple programming, high reliability, good maintainability.
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